THREE-WAY VALVE Russian patent published in 2013 - IPC F16K11/10 

FIELD: machine building.

SUBSTANCE: three-way valve comprises a body with inlet, outlet, drainage and control cavities, a piston and a loading spring. Inlet and drainage valves are connected to each other via a stem. The stem is sealed along the diameter of the body. In the stem there is a channel, which communicates the outlet and drainage cavities. At the end of the stem at the side of the drainage cavity there is a seat. The specified seat contacts with the drainage valve. At the same time the diameter of the seat of the drainage valve is more than the diameter of the stem sealing.

EFFECT: invention eliminates unintentional gas consumption during actuation and less stringent requirement to strength of operating manifolds and reservoirs.

1 cl, 1 dwg